When my game tries to auto save it gives me a prompt to save the game manually first but when I go to save the game manually it wont save it says that access is denied and I don't know how to give it the necessary access.
Here is a full report The Battle for Wesnoth version 1.14.0 (f5fd48d-Clean)
Running on Microsoft Windows 10 (10.0.16299)

If you go into your user data (C:\Users\USER\OneDrive\Documents\My Games\Wesnoth1.14 as per the log above), is there a saves folder in there already, or a file with the exact same name? If there isn’t, what happens if you try to create a folder with that name yourself?

Just installed the game today, was going through the tutorial but it kept on saying the same message for me. Can't auto save, must save manually, doesn't let me do that either. Checked out the user data as had been suggested, although that hasn't worked either. Any further suggestions?

Edit: I deleted both the saves folder and the save_index and it saved the first part of my tutorial on the first turn, then on the second turn the save "Cannot auto-save" message turned up. I've gone back to the user data and the folders have been created again without me doing anything.

Just installed the game today, was going through the tutorial but it kept on saying the same message for me. Can't auto save, must save manually, doesn't let me do that either. Checked out the user data as had been suggested, although that hasn't worked either. Any further suggestions?

Edit: I deleted both the saves folder and the save_index and it saved the first part of my tutorial on the first turn, then on the second turn the save "Cannot auto-save" message turned up. I've gone back to the user data and the folders have been created again without me doing anything.

Both the save_index and the save from the first turn contained in the saves folder are read only. However, the save_index opens with notepad etc. as a bunch of symbols and the file from the saves folder doesn't open at all.

Oh, I can't see any box that has an option to tick when I right click either of the files. I've just tried deleting the files again but they keep on popping back up in the same condition, the first turn save doesn't disappear. I hope I can find a solution, I was really enjoying what I have played of the game so far!

I went to check my saves folder, and strangely it's ticked as read only Too... but saving/autosaving works fine to the best of my knowledge..
So the problem must be somewhere else... I hope developers could help when they come online. For now we could try to gather as much information about the problem for them...
1) Do you use one drive software? (this has been known to cause huge amount of issues with wesnoth 1.14)
2) In game preferences -> advanced tab, what says in "compress saved games"? Mine says "Gzip"
3) What exactly is your operating system windows 7 or 10?
4) Is your wesnoth installed through steam or not?
5) not sure what else can help them figure out the problem maybe upload here the today's date log file from this directory: C:\Users\Admin\Documents\My Games\Wesnoth1.14\logs
PS. i forgot to mention that there is a chance that your addon/campaign might have bug that forbids saving.. you could try to run local multiplayer game with default era and see if it lets you save or not...

I do use one drive, tried to install directing it away from one drive but I couldn't find a way to. My in game preferences also say Gzip. Also, my operating system is windows 10 and yes, I installed it with steam. It also says 'Error validating data core' whenever I load the game up or try to open a new map